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                <h2 id="自定义返回json格式的输出函数"><a href="#自定义返回json格式的输出函数" class="headerlink" title="自定义返回json格式的输出函数"></a>自定义返回<code>json</code>格式的输出函数</h2><p><strong>参数：</strong></p>
<table>
<thead>
<tr>
<th align="left">参数名</th>
<th align="left">必选</th>
<th align="left">类型</th>
<th>说明</th>
</tr>
</thead>
<tbody><tr>
<td align="left">code</td>
<td align="left">是</td>
<td align="left">int</td>
<td>返回码</td>
</tr>
<tr>
<td align="left">msg</td>
<td align="left">是</td>
<td align="left">string</td>
<td>返回信息 default=”error”</td>
</tr>
<tr>
<td align="left">data</td>
<td align="left">否</td>
<td align="left">array</td>
<td>返回的数据</td>
</tr>
<tr>
<td align="left">httpStatus</td>
<td align="left">否</td>
<td align="left">int</td>
<td>Http请求状态码</td>
</tr>
</tbody></table>
<p><strong>返回示例</strong></p>
<pre class=" language-json"><code class="language-json">  <span class="token punctuation">{</span>
    <span class="token property">"code"</span><span class="token operator">:</span> <span class="token number">1</span><span class="token punctuation">,</span>
    <span class="token property">"msg"</span> <span class="token operator">:</span> "登录成功“
    <span class="token property">"data"</span><span class="token operator">:</span> <span class="token punctuation">[</span><span class="token punctuation">]</span>
  <span class="token punctuation">}</span></code></pre>
<p><strong>代码</strong></p>
<pre class=" language-php"><code class="language-php"><span class="token comment" spellcheck="true">/**
 * @param $code
 * @param string $msg
 * @param array $data
 * @param int $httpStatus
 * @return \think\response\Json
 */</span>
<span class="token keyword">function</span> <span class="token function">writeJson</span><span class="token punctuation">(</span><span class="token variable">$code</span><span class="token punctuation">,</span> <span class="token variable">$msg</span> <span class="token operator">=</span> <span class="token string">"error"</span><span class="token punctuation">,</span> <span class="token variable">$data</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token variable">$httpStatus</span> <span class="token operator">=</span> <span class="token number">200</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
    <span class="token variable">$result</span> <span class="token operator">=</span> <span class="token punctuation">[</span>
        <span class="token string">'code'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token variable">$code</span><span class="token punctuation">,</span>
        <span class="token string">'msg'</span>  <span class="token operator">=</span><span class="token operator">></span> <span class="token variable">$msg</span><span class="token punctuation">,</span>
        <span class="token string">'data'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token variable">$data</span><span class="token punctuation">,</span>
    <span class="token punctuation">]</span><span class="token punctuation">;</span>
    <span class="token keyword">return</span> <span class="token function">json</span><span class="token punctuation">(</span><span class="token variable">$result</span><span class="token punctuation">,</span> <span class="token variable">$httpStatus</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span></code></pre>
<h2 id="格式化输出文件大小"><a href="#格式化输出文件大小" class="headerlink" title="格式化输出文件大小"></a>格式化输出文件大小</h2><p><strong>代码</strong></p>
<pre class=" language-php"><code class="language-php"><span class="token comment" spellcheck="true">/**
 * [format_size 格式化文件大小]
 * @param  [int] $size [文件大小]
 * @return [float/double]       [格式化后的文件大小]
 */</span>
<span class="token keyword">function</span> <span class="token function">format_size</span><span class="token punctuation">(</span><span class="token variable">$size</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token variable">$arr</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token string">'B'</span><span class="token punctuation">,</span> <span class="token string">'KB'</span><span class="token punctuation">,</span> <span class="token string">'M'</span><span class="token punctuation">,</span> <span class="token string">'G'</span><span class="token punctuation">,</span> <span class="token string">'T'</span><span class="token punctuation">,</span> <span class="token string">'P'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
    <span class="token variable">$i</span> <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
    <span class="token keyword">while</span> <span class="token punctuation">(</span><span class="token variable">$size</span> <span class="token operator">>=</span> <span class="token number">1024</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token variable">$size</span> <span class="token operator">=</span> <span class="token variable">$size</span> <span class="token operator">/</span> <span class="token number">1024</span><span class="token punctuation">;</span>
        <span class="token variable">$i</span><span class="token operator">++</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token comment" spellcheck="true">// 四舍五入进行返回</span>
    <span class="token keyword">return</span> <span class="token function">round</span><span class="token punctuation">(</span><span class="token variable">$size</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token variable">$arr</span><span class="token punctuation">[</span><span class="token variable">$i</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span></code></pre>
<h2 id="可逆加密算法"><a href="#可逆加密算法" class="headerlink" title="可逆加密算法"></a>可逆加密算法</h2><pre class=" language-php"><code class="language-php"><span class="token comment" spellcheck="true">/**
 * [encrypt 可逆加密算法]
 * @param  [type] $data [description]
 * @param  [type] $key  [description]
 * @return [type]       [description]
 */</span>
<span class="token keyword">function</span> <span class="token function">encrypt</span><span class="token punctuation">(</span><span class="token variable">$data</span><span class="token punctuation">,</span> <span class="token variable">$key</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token variable">$key</span> <span class="token operator">=</span> <span class="token function">md5</span><span class="token punctuation">(</span><span class="token variable">$key</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token variable">$x</span> <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
    <span class="token variable">$len</span> <span class="token operator">=</span> <span class="token function">strlen</span><span class="token punctuation">(</span><span class="token variable">$data</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token variable">$l</span> <span class="token operator">=</span> <span class="token function">strlen</span><span class="token punctuation">(</span><span class="token variable">$data</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token variable">$char</span> <span class="token operator">=</span> <span class="token string">''</span><span class="token punctuation">;</span>
    <span class="token variable">$str</span> <span class="token operator">=</span> <span class="token string">''</span><span class="token punctuation">;</span>
    <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token variable">$i</span><span class="token operator">=</span><span class="token number">0</span><span class="token punctuation">;</span> <span class="token variable">$i</span> <span class="token operator">&lt;</span> <span class="token variable">$len</span><span class="token punctuation">;</span> <span class="token variable">$i</span><span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> 
        <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token variable">$x</span> <span class="token operator">==</span> <span class="token variable">$l</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
            <span class="token variable">$x</span> <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
        <span class="token variable">$char</span> <span class="token punctuation">.</span><span class="token operator">=</span> <span class="token variable">$key</span><span class="token punctuation">{</span><span class="token variable">$x</span><span class="token punctuation">}</span><span class="token punctuation">;</span>
        <span class="token variable">$x</span><span class="token operator">++</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token variable">$i</span> <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> <span class="token variable">$i</span> <span class="token operator">&lt;</span> <span class="token variable">$len</span><span class="token punctuation">;</span> <span class="token variable">$i</span><span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token variable">$str</span> <span class="token punctuation">.</span><span class="token operator">=</span> <span class="token function">chr</span><span class="token punctuation">(</span><span class="token function">ord</span><span class="token punctuation">(</span><span class="token variable">$data</span><span class="token punctuation">{</span><span class="token variable">$i</span><span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token punctuation">(</span><span class="token function">ord</span><span class="token punctuation">(</span><span class="token variable">$char</span><span class="token punctuation">{</span><span class="token variable">$i</span><span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">%</span> <span class="token number">256</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">return</span> <span class="token function">base64_encode</span><span class="token punctuation">(</span><span class="token variable">$str</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span></code></pre>
<h2 id="解密算法"><a href="#解密算法" class="headerlink" title="解密算法"></a>解密算法</h2><pre class=" language-php"><code class="language-php"><span class="token comment" spellcheck="true">/**
 * [decrypt 解密算法]
 * @param  [type] $data [description]
 * @param  [type] $key  [description]
 * @return [type]       [description]
 */</span>
<span class="token keyword">function</span> <span class="token function">decrypt</span><span class="token punctuation">(</span><span class="token variable">$data</span><span class="token punctuation">,</span> <span class="token variable">$key</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token variable">$key</span> <span class="token operator">=</span> <span class="token function">md5</span><span class="token punctuation">(</span><span class="token variable">$key</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token variable">$x</span> <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
    <span class="token variable">$data</span> <span class="token operator">=</span> <span class="token function">base64_decode</span><span class="token punctuation">(</span><span class="token variable">$data</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token variable">$len</span> <span class="token operator">=</span> <span class="token function">strlen</span><span class="token punctuation">(</span><span class="token variable">$data</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token variable">$l</span> <span class="token operator">=</span> <span class="token function">strlen</span><span class="token punctuation">(</span><span class="token variable">$key</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token variable">$char</span> <span class="token operator">=</span> <span class="token string">""</span><span class="token punctuation">;</span>
    <span class="token variable">$str</span> <span class="token operator">=</span> <span class="token string">""</span><span class="token punctuation">;</span>
    <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token variable">$i</span> <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> <span class="token variable">$i</span> <span class="token operator">&lt;</span> <span class="token variable">$len</span><span class="token punctuation">;</span> <span class="token variable">$i</span><span class="token operator">++</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token variable">$x</span> <span class="token operator">==</span> <span class="token variable">$l</span><span class="token punctuation">)</span>
        <span class="token punctuation">{</span>
            <span class="token variable">$x</span> <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
        <span class="token variable">$char</span> <span class="token punctuation">.</span><span class="token operator">=</span> <span class="token function">substr</span><span class="token punctuation">(</span><span class="token variable">$key</span><span class="token punctuation">,</span> <span class="token variable">$x</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token variable">$x</span><span class="token operator">++</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token variable">$i</span> <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> <span class="token variable">$i</span> <span class="token operator">&lt;</span> <span class="token variable">$len</span><span class="token punctuation">;</span> <span class="token variable">$i</span><span class="token operator">++</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">ord</span><span class="token punctuation">(</span><span class="token function">substr</span><span class="token punctuation">(</span><span class="token variable">$data</span><span class="token punctuation">,</span> <span class="token variable">$i</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">&lt;</span> <span class="token function">ord</span><span class="token punctuation">(</span><span class="token function">substr</span><span class="token punctuation">(</span><span class="token variable">$char</span><span class="token punctuation">,</span> <span class="token variable">$i</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
        <span class="token punctuation">{</span>
            <span class="token variable">$str</span> <span class="token punctuation">.</span><span class="token operator">=</span> <span class="token function">chr</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token function">ord</span><span class="token punctuation">(</span><span class="token function">substr</span><span class="token punctuation">(</span><span class="token variable">$data</span><span class="token punctuation">,</span> <span class="token variable">$i</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token number">256</span><span class="token punctuation">)</span> <span class="token operator">-</span> <span class="token function">ord</span><span class="token punctuation">(</span><span class="token function">substr</span><span class="token punctuation">(</span><span class="token variable">$char</span><span class="token punctuation">,</span> <span class="token variable">$i</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
        <span class="token keyword">else</span>
        <span class="token punctuation">{</span>
            <span class="token variable">$str</span> <span class="token punctuation">.</span><span class="token operator">=</span> <span class="token function">chr</span><span class="token punctuation">(</span><span class="token function">ord</span><span class="token punctuation">(</span><span class="token function">substr</span><span class="token punctuation">(</span><span class="token variable">$data</span><span class="token punctuation">,</span> <span class="token variable">$i</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">-</span> <span class="token function">ord</span><span class="token punctuation">(</span><span class="token function">substr</span><span class="token punctuation">(</span><span class="token variable">$char</span><span class="token punctuation">,</span> <span class="token variable">$i</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">return</span> <span class="token variable">$str</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span></code></pre>
<h2 id="获取客户端操作系统信息"><a href="#获取客户端操作系统信息" class="headerlink" title="获取客户端操作系统信息"></a>获取客户端操作系统信息</h2><pre class=" language-php"><code class="language-php"><span class="token comment" spellcheck="true">/*
 * PHP获取客户端操作系统信息
 */</span>
<span class="token keyword">function</span> <span class="token function">get_os</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
    <span class="token variable">$agent</span> <span class="token operator">=</span> <span class="token variable">$_SERVER</span><span class="token punctuation">[</span><span class="token string">'HTTP_USER_AGENT'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
    <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
    <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/win/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">strpos</span><span class="token punctuation">(</span><span class="token variable">$agent</span><span class="token punctuation">,</span> <span class="token string">'95'</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'Windows 95'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/win 9x/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">strpos</span><span class="token punctuation">(</span><span class="token variable">$agent</span><span class="token punctuation">,</span> <span class="token string">'4.90'</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'Windows ME'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/win/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/98/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'Windows 98'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/win/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/nt 6.0/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'Windows Vista'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/win/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/nt 6.1/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'Windows 7'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/win/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/nt 6.2/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'Windows 8'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span><span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/win/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/nt 10.0/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'Windows 10'</span><span class="token punctuation">;</span><span class="token shell-comment comment">#添加win10判断</span>
    <span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/win/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/nt 5.1/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'Windows XP'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/win/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/nt 5/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'Windows 2000'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/win/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/nt/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'Windows NT'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/win/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/32/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'Windows 32'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/linux/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'Linux'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/unix/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'Unix'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/sun/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/os/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'SunOS'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/ibm/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/os/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'IBM OS/2'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/Mac/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/PC/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'Macintosh'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/PowerPC/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'PowerPC'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/AIX/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'AIX'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/HPUX/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'HPUX'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/NetBSD/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'NetBSD'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/BSD/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'BSD'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/OSF1/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'OSF1'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/IRIX/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'IRIX'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/FreeBSD/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'FreeBSD'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/teleport/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'teleport'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/flashget/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'flashget'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/webzip/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'webzip'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">preg_match</span><span class="token punctuation">(</span><span class="token string">'/offline/i'</span><span class="token punctuation">,</span> <span class="token variable">$agent</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'offline'</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">else</span>
    <span class="token punctuation">{</span>
        <span class="token variable">$os</span> <span class="token operator">=</span> <span class="token string">'未知操作系统'</span><span class="token punctuation">;</span>
<span class="token comment" spellcheck="true">//        $os = get_device_type();</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">return</span> <span class="token variable">$os</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span></code></pre>

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